Years, months, days
We count complete years first, then complete calendar months, then the remaining days — the way ages are usually stated.
Free date tool100% free • No signup required
Age calculator
Calculate the exact difference between two dates.
Related tools
See all tools →Good to know
How the calculation works
Totals
Total months, weeks and days are counted across the whole period, so each is a separate way of describing the same gap.
Leap years
Leap days are included automatically, so the day count is exact.
FAQ
Questions parents ask
Can I use this for adults?
Yes. It works for any two dates — birthdays, anniversaries, or anything else.
What if the second date is earlier?
We’ll swap them and show the difference.
Is my date of birth stored?
No. Nothing is saved or sent anywhere.